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Erland Liljeroth

Erland Liljeroth
I am a senior lecturer with extension duties and also promoted professor in plant protection. I work with extension and research in plant protection especially regarding fungal and oomycete pathogens. I participate in various national and international extension networks as for example Partnership Alnarp, ”Fältforsk” (field research) at SLU, Euroblight network and have active cooperation with several stakeholders on plant protection.


My research deals with plant defence and induced resistance and practical applications of alternative plant protection methods and traditional pesticides to obtain efficient disease control with minimized use of pesticides. This is done by e.g. combining cultivar resistance with non-toxic plant resistance inducers (strengtherner’s) and fungicides. I work mainly with potato diseases such as late blight (Phytopthora infestans) and early blight (Alternaria solani) but also with other crops and diseases, e.g. powdery mildew on cucumber. In collaboration with other researcher I also study pathogen population changes over time and as response to different control methods.


PhD in ”Interactions between plants and microorganisms”, 1990

Post Doc at Research Institute Ital, Netherlands, 1991

Researcher at SLU, Sweden 1992-1995, 1997-2012

Lecturer with extension duties and promoted professor in Plant Protection, 2012-

Selected publications

Mulugeta, T.; Abreha K, Tekie H, Mulato B, Yesuf M, Andreasson E, Liljeroth E, Alexandersson E. 2019. Phosphite protects against potato and tomato late blight in tropical climates and has varying toxicity depending on the Phytophthora infestans isolate. Crop Protection 121, 139–146.

E. Edin, E. Liljeroth & B. Andersson. 2019. Long term field sampling in Sweden reveals a shift in occurrence of cytochrome b genotype and amino acid substitution F129L in Alternaria solani, togetherwitha high incidence of the G143A substitution in Alternaria alternata. Eur P Plant Pathol.

Firuz Odilbekov & Eva Edin & Hadis Mostafanezhad & Hilde Coolman & Laura J. Grenville-Briggs & Erland Liljeroth. 2019. Within-season changes in Alternaria solani populations in potato in response to fungicide application strategies. Eur J Plant Pathol.

Rur M, Rämert B, Hökeberg M, Vetekuri RR Grenville-Briggs L, Liljeroth E (2018) Screening of alternative products for integrated pest management of cucurbit powdery mildew in Sweden. European Journal of Plant Pathology 150:1, 127-138.

Lehsten V, Wiik L, Hannukkala A, Andreasson E, Chen DL, Ou TH, Liljeroth E, Lankinen Å, Grenville-Briggs L (2017) Earlier occurrence and increased explanatory power of climate for the first incidence of potato late blight caused by Phytophthora infestans in Fennoscandia. PLOS ONE 12:5, DOI: 10.1371/journal.pone.0177580

Odilbekov F, Edin E, Garkava-Gustavsson L, Persson-egnaHovmalm H, Liljeroth E (2016) Genetic diversity and occurrence of the F129L substitutions among isolates of Alternaria solani in south-eastern Sweden. Hereditas (2016) 153:10. DOI 10.1186/s41065-016-0014-0.

Alexandersson E, Mulugeta T, Lankinen Å, Liljeroth E, Andreasson E. (2016) Plant Resistance Inducers against Pathogens in Solanaceae Species—From Molecular Mechanisms to Field Application. International Journal of Molecular Science. In Press.

Liljeroth E, Lankinen Å, Wiik L, Burra DD, Alexandersson E, Andreasson E (2016) Potassium phosphite combined with reduced doses of fungicides provides efficient protection against late blight in large-scale field trials. Crop Protection 86, 42-55.

Bengtsson T, Holefors A, Liljeroth E, Hultberg M, Andreasson E (2015) Biosurfactants have the potential to induce defence against Phytophthora infestans in potato. Potato Research. Doi 10.1007/s11540-015-9286-4.

Burra DD, Berkowitz O, Hedley PE, Morris J, Resjö S, Levander F, Liljeroth E, Andreasson E, Alexandersson E (2014) Phosphite-induced changes of the transcriptome and secretome in Solanum tuberosum leading to resistance against Phytophthora infestans. BMC Plant Biology 14:254, 17pages.

Bengtsson T, Weighill D, Proux-Wéra E, Levander F, Resjö S, Dhar Burra D, Moushib LI, Hedley PE, Erland Liljeroth E, Jacobson D, Alexandersson E, Andreasson E (2014). Proteomics and transcriptomics of the BABA-induced resistance response in potato using a novel functional annotation approach. BMC Genomics 2014, 15:315,

Bengtsson T, Holefors A, Witzell J, Andreasson E, Liljeroth E (2014) Activation of defence responses to Phytophthora infestans in potato by BABA. Plant Pathology 63, 193-202.

Odilbekov F, Carlson-Nilsson U, Liljeroth E (2014) Phenotyping early blight resistance in potato cultivars and breeding clones. Euphytica DOI 10.1007/s10681-013-1054-4

Hultberg M, Bengtsson T, Liljeroth E. (2010) Late blight on potato is suppressed by the biosurfactant-producing strain Pseudomonas koreensis 2.74 and its biosurfactant. BioControl 55, 543-550

Liljeroth E, Bengtsson T, Wiik L, Andreasson E. (2010) Induced resistance in potato to Phytophthora infestans – effects of BABA in greenhouse and field tests with different potato varieties. European Journal of Plant Pathology 127, 171-183.

Nguyen THP, Vinnere Pettersson O, Olsson P, Liljeroth E. (2010) Identification of Colletotrichum species associated with anthracnose disease of coffee in Vietnam. European Journal of Plant Pathology. 127, 73-87.

Nguyen THP, Säll T, Bryngelsson T, Liljeroth E. (2009) Variation among Colletotrichum gloeosporioides isolates from infected coffee berries at different locations in Vietnam. Plant Pathology 58, 898-909.


Professor emeritus at the Department of Plant Protection Biology
Telephone: +4640-415567
Postal address:
Växtskyddsbiologi, Box 190
234 22 LOMMA
Visiting address: Sundsvägen 16, Alnarp